建一镇位于大石桥市最东部山区，海拔高度５２０米，１月份平均气温－１１２℃，山高阴大，日照时间短，处于我省栽培大苹果的北界。近年我镇栽植苹果树面积不断扩大，但栽植的品种多以国光为主。为了更换优良品种，我们在国光树上进行高接换头，在选用高接品种中，以沈... Built in the town of Dashiqiao the easternmost mountainous region, 520 meters above sea level, January average temperature -11  2 ℃, mountain Gaoyin large sunshine time is short, in our province cultivation of apple north boundary. In recent years, the area of ​​apple trees planted by our town has been continuously expanded, but the cultivated varieties are mostly dominated by Guoguang. In order to replace the good breed, we have high pick-up head in Guoguang Tree.